__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"

if __name__ == '__main__':
    import sys
    sys.path.insert(0, '..')
    sys.path.insert(0, '../..')

from hamcrest.library.object.haslength import *

from hamcrest.core.core.isequal import equal_to
from hamcrest.library.number.ordering_comparison import greater_than
from matcher_test import MatcherTest
import unittest


class FakeWithLen(object):

    def __init__(self, len):
        self.len = len

    def __len__(self):
        return self.len

    def __str__(self):
        return 'FakeWithLen'


class FakeWithoutLen(object):

    def __str__(self):
        return 'FakeWithoutLen'


class HasLengthTest(MatcherTest):

    def testPassesResultOfLenToNestedMatcher(self):
        self.assert_matches('equal', has_length(equal_to(42)), FakeWithLen(42))
        self.assert_does_not_match('unequal',
                                   has_length(equal_to(42)), FakeWithLen(1))

    def testProvidesConvenientShortcutForHasLengthEqualTo(self):
        self.assert_matches('equal', has_length(42), FakeWithLen(42))
        self.assert_does_not_match('unequal', has_length(42), FakeWithLen(1))

    def testDoesNotMatchObjectWithoutLen(self):
        self.assert_does_not_match('no length', has_length(42), object())

    def testHasReadableDescription(self):
        self.assert_description('object with length of a value greater than <5>',
                                has_length(greater_than(5)))

    def testSuccessfulMatchDoesNotGenerateMismatchDescription(self):
        self.assert_no_mismatch_description(has_length(3), 'foo')

    def testMismatchDescriptionForItemWithWrongLength(self):
        self.assert_mismatch_description('was <FakeWithLen> with length of <4>',
                                         has_length(3), FakeWithLen(4))

    def testMismatchDescriptionForItemWithoutLength(self):
        self.assert_mismatch_description("was <FakeWithoutLen>",
                                         has_length(3), FakeWithoutLen())

    def testDescribeMismatchForItemWithWrongLength(self):
        self.assert_describe_mismatch('was <FakeWithLen> with length of <4>',
                                      has_length(3), FakeWithLen(4))

    def testDescribeMismatchForItemWithoutLength(self):
        self.assert_describe_mismatch("was <FakeWithoutLen>",
                                      has_length(3), FakeWithoutLen())



if __name__ == '__main__':
    unittest.main()
